Air release valve



FIG. 1 is a front view of an air release valve showing my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an isometric side view thereof.

The portions of the air release valve shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for the air release valve, as shown and described. 